Hall is facing 20 charges, including multiple counts of murder and kidnapping stemming from three separate incidents from 2009 through 2011.

Prosecutors allege that Hall beat David Glasser with a baseball bat in July 2009 in retaliation for a suspected theft, and then tried to discredit Glasser as a witness by framing him for a fake armed robbery in New York state.

In August 2011, weeks before he was to testify against Hall, Glasser and his roommate, Edward Frampton, and their friend Robert Chadwell, all of Pittsfield, disappeared.

Their dismembered bodies were found in Becket nearly two weeks later.

According to prosecutors, Hall was a ranking member of the local Hells Angels when he, David Chalue, 46, of North Adams, and Caius Veiovis, 32, of Pittsfield, kidnapped the three victims from Frampton’s Pittsfield home sometime in the early hours of Aug. 28, 2011, and fatally shot them.

Hall is being tried first.

The trials were moved to Hampden Superior Court after defense lawyers said publicity in Berkshire County would make a fair trial there impossible.

A fourth co-defendant in the case and he is on the prosecution’s witness list.

David Casey, 65, of Canaan, N.Y., is not charged with murder but is charged with three counts of accessory after the fact of murder, three counts of accessory after the fact of kidnapping, and three counts of accessory after the fact of intimidation of a witness.